[mutter/wip/carlosg/clip-regions: 14/16] cogl: Drop unused struct field

[Carlos Garnacho <carlosg src gnome org>]

commit 3ba395e21c91ff3cbf4e7d535cb4df28b4f3e44a
Author: Carlos Garnacho <carlosg gnome org>
Date:   Sun Oct 20 13:14:09 2019 +0200

    cogl: Drop unused struct field
    
    We only ever stored that the current clip uses the stencil buffer, but
    never read it back. It doesn't seem like we'll have an use for it.
    
    https://gitlab.gnome.org/GNOME/mutter/merge_requests/867

 cogl/cogl/cogl-context-private.h         | 5 -----
 cogl/cogl/driver/gl/cogl-clip-stack-gl.c | 3 ---
 2 files changed, 8 deletions(-)
---
diff --git a/cogl/cogl/cogl-context-private.h b/cogl/cogl/cogl-context-private.h
index 04040ce8c..d767abcf6 100644
--- a/cogl/cogl/cogl-context-private.h
+++ b/cogl/cogl/cogl-context-private.h
@@ -272,11 +272,6 @@ struct _CoglContext
      same state multiple times. When the clip state is flushed this
      will hold a reference */
   CoglClipStack    *current_clip_stack;
-  /* Whether the stencil buffer was used as part of the current clip
-     state. If TRUE then any further use of the stencil buffer (such
-     as for drawing paths) would need to be merged with the existing
-     stencil buffer */
-  gboolean          current_clip_stack_uses_stencil;
 
   /* This is used as a temporary buffer to fill a CoglBuffer when
      cogl_buffer_map fails and we only want to map to fill it with new
diff --git a/cogl/cogl/driver/gl/cogl-clip-stack-gl.c b/cogl/cogl/driver/gl/cogl-clip-stack-gl.c
index 31f078f93..2bc754cc0 100644
--- a/cogl/cogl/driver/gl/cogl-clip-stack-gl.c
+++ b/cogl/cogl/driver/gl/cogl-clip-stack-gl.c
@@ -383,7 +383,6 @@ _cogl_clip_stack_gl_flush (CoglClipStack *stack,
     {
       COGL_NOTE (CLIPPING, "Flushed empty clip stack");
 
-      ctx->current_clip_stack_uses_stencil = FALSE;
       GE (ctx, glDisable (GL_SCISSOR_TEST));
       return;
     }
@@ -502,6 +501,4 @@ _cogl_clip_stack_gl_flush (CoglClipStack *stack,
            * box */
         }
     }
-
-  ctx->current_clip_stack_uses_stencil = using_stencil_buffer;
 }